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slavert » Пт окт 28, 2005 6:03 pm
Bibliographic Information
Preparation and electrochemical characterization of nanocrystalline Li[Li0.12Ni0.32Mn0.56]O2 pyrolyzed from polyacrylate salts. Yu, L. H.; Cao, Y. L.; Yang, H. X.; Ai, X. P.; Ren, Y. Y. Department of Chemistry, Wuhan University, Wuhan, Peop. Rep. China. Materials Chemistry and Physics (2004), 88(2-3), 353-356. Publisher: Elsevier B.V., CODEN: MCHPDR ISSN: 0254-0584. Journal written in English. CAN 142:117450 AN 2004:861802 CAPLUS
Abstract
A nanocryst. Li[Li0.12Ni0.32Mn0.56]O2 powder was synthesized by a pyrolysis method using polyacrylate salts as the precursor compds. XRD and TEM results demonstrated that the Li[Li0.12Ni0.32Mn0.56]O2 powder has a layered structure as -NaFeO2 and has an av. particle size of 50-70 nm. The charge-discharge expts. show that the Li[Li0.12Ni0.32Mn0.56]O2 electrode can deliver a reversible capacity of .apprx.140 mA h g-1 cycling at 2.5-4.5 V and can still remain 94% of its initial capacity after 10 cycles, showing a great promise for future applications.
Bibliographic Information
Gels containing polyacrylate salts in polyhydric alcohols for poultices. Saiga, Masamichi. (Daio Paper Corporation, Japan). Jpn. Kokai Tokkyo Koho (2003), 3 pp. CODEN: JKXXAF JP 2003055200 A2 20030226 Patent written in Japanese. Application: JP 2001-238505 20010806. Priority: . CAN 138:193285 AN 2003:150125 CAPLUS
Patent Family Information
Patent No. Kind Date Application No. Date
JP 2003055200 A2 20030226 JP 2001-238505 20010806
Priority Application
JP 2001-238505 20010806
Abstract
Ointment gels for poultices are prepd. by (1) dispersing or dissolving acrylic acid salts (neutralization degree 10-50 mol %) in polyhydric alcs. and (2) blending with aq. soln. of multivalent metal compds. The gels provide excellent percutaneous absorption of drugs, such as salicylic acid esters, without skin irritation. For example, acrylic acid salt (neutralization degree 50 mol %), Al(OH)3 gel, and Me salicylate, were dispersed in glycerin. The above soln. was blended with an aq. soln. contg. tartaric acid and the whole mixt. was applied on a polyester nonwoven fabric and left for 24 h at 40 for curing.
Bibliographic Information
Solid state polyelectrolytes. MacKnight, W. J. Dep. Chem. Polym. Sci. Eng., Univ. Massachusetts, Amherst, MA, USA. Polymer Preprints (American Chemical Society, Division of Polymer Chemistry) (1973), 14(2), 813-19. CODEN: ACPPAY ISSN: 0032-3934. Journal; General Review written in English. CAN 82:171467 AN 1975:171467 CAPLUS
Abstract
A review with 16 refs. on the mol. structure-property relationships of polyacrylate salts, quaternary ammonium polymers, and polyphosphate salts.
Bibliographic Information
Dielectric properties of polyelectrolytes. I. Tetra-n-butylammonium polyacrylate. Minakata, Akira; Imai, Nobuhisa. Fac. Sci., Nagoya Univ., Nagoys, Japan. Biopolymers (1972), 11(2), 329-46. CODEN: BIPMAA ISSN: 0006-3525. Journal written in English. CAN 76:141410 AN 1972:141410 CAPLUS
Abstract
Dielec. const. and loss of aq. solns. of tetrabutylammonium polyacrylate [25852-11-3] were measured in the frequency range from 300 Hz to 6 MHz and compared with Na and other salts at various conditions. Two dispersions are obsd. in the low-frequency range (LFD, several hundreds of Hz to several kHz) and in the high-frequency range (HFD, several 10 kHz to MHz), resp., both of which are approx. expressed as the Cole-Cole dispersion formula with Cole parameters .sim.0.3. Large values of the dielec. increment, its nonlinear concn. dependence, and other features suggest that both dispersions are explained by relaxations of 2 different ionic processes. Results for HFD were qual. similar to those reported previously and compared with theories of the Maxwell-Wagner-type effect. LFD may be due to polarization of loosely bound counterions. A model for LFD is presented on the basis of counterion fluctuation.
Bibliographic Information
Mechanical and other physical properties of polyelectrolyte salts in the solid state. Nielsen, Lawrence E. Monsanto Co., St. Louis, MO, USA. Polymer Preprints (American Chemical Society, Division of Polymer Chemistry) (1968), 9(1), 596-602. CODEN: ACPPAY ISSN: 0032-3934. Journal written in English. CAN 71:125306 AN 1969:525306 CAPLUS
Abstract
Polyacrylate salts can be fabricated in heated molds by using mixed powders of poly(acrylic acid) and metal oxides. Because of the strong intermol. forces in these salts, they have elastic moduli several times greater than the moduli of conventional plastics. They also have very low coeffs. of expansion and high compression strengths. Composites contg. metallic and inorg. fillers were made and their mech. properties measured.
Bibliographic Information
Ionic distribution and polymer conformation, near phase separation, in sodium polyacrylate/divalent cations mixtures: small angle X-ray and neutron scattering. Sabbagh, I.; Delsanti, M.; Lesieur, P. Service de Chimie Moleculaire, Gif-sur-Yvette, Fr. European Physical Journal B: Condensed Matter Physics (1999), 12(2), 253-260. Publisher: Springer-Verlag, CODEN: EPJBFY ISSN: 1434-6028. Journal written in English. CAN 132:93979 AN 1999:796423 CAPLUS
Abstract
Anomalous small-angle X-ray scattering expts. show that before demixing in sodium polyacrylate/cobalt and sodium polyacrylate/calcium mixts. all the divalent counterions are in the close vicinity of the polyacrylate chain. The present results are consistent with previous UV/VIS spectroscopy, which have shown that all cobalt ions are chem. assocd. with acrylate groups. The chem. assocn. dehydrates the acrylate monomers. However, the hydrophobicity of the complexed monomers is not strong enough to induce a collapse of the polymer chain at small spatial scale before the demixing. Indeed, the scattered intensity (X-ray and neutron scattering) decreases with the scattering vector q as q-x with x 2 for q > 0.1 nm-1 which indicates that the local conformation of the chain is Gaussian.
Bibliographic Information
Light filters based on fluoroalkyl methacrylate copolymers containing copper and cobalt salts. Koryagina, E. L.; Arkhireev, V. P.; Volkova, T. A. Kazan. Gos. Tekhnol. Univ., Kazan, Russia. Plasticheskie Massy (2003), (8), 41-43. Publisher: ZAO NP "Plasticheskie Massy", CODEN: PLMSAI ISSN: 0554-2901. Journal written in Russian. CAN 140:147158 AN 2003:860916 CAPLUS
Abstract
The effect of chem. structure on optical characteristics and photo- and chem. stability of fluoroalkyl methacrylate copolymers was studied.
Indexing -- Section 38-3 (Plastics Fabrication and Uses)
Section cross-reference(s): 73
Molecular structure-property relationship
Optical filters
Optical transmission
Thermal stability
(light filters based on fluoroalkyl methacrylate copolymers contg. copper and cobalt salts)
Stability
(photo-; light filters based on fluoroalkyl methacrylate copolymers contg. copper and cobalt salts)
Bibliographic Information
Mesomorphic and dielectric properties of a side chain liquid crystalline polyacrylate and copper(II) crosslinked derivatives. Puertolas, J. A.; Diaz Calleja, R.; Barbera, J.; Oriol, L.; Pinol, M.; Serrano, J. L. Dep. Ciencia Tecnologia Materiales, Centro Politecnico Superior, Univ. Zaragoza, Zaragoza, Spain. Acta Polymerica (1999), 50(2-3), 84-95. Publisher: Wiley-VCH Verlag GmbH, CODEN: ACPODY ISSN: 0323-7648. Journal written in English. CAN 130:267979 AN 1999:140101 CAPLUS
Abstract
A side-chain liq.-cryst. polyacrylate contg. a salicylaldimine group was synthesized and complexed with copper(II) ions to generate metallomesogenic crosslinking of polymeric chains. The mesomorphic properties of the parent and complexed polymers were studied by optical microscopy, DSC, and x-ray diffraction. In addn., these materials were investigated by dielec. spectroscopy. Dielec. measurements of the parent polymer reveal the presence of 2 sub-glass relaxations ( and ). The a relaxation assocd. with the Tg is masked by a conductive process, but at higher temps. a relaxation is obsd. These relaxation processes were characterized and their activation energies evaluated. The influence of the mesogenic order and metal crosslinking on some relaxation processes was also detd.
Bibliographic Information
Spectroscopic study (UV-visible and electron paramagnetic resonance) of the interactions between synthetic polycarboxylates and copper ions. Francois, Jeanne; Heitz, Caroline; Mestdagh, Michele M. Institut Charles Sadron, CNRS-ULP, Strasbourg, Fr. Polymer (1997), 38(21), 5321-5332. Publisher: Elsevier, CODEN: POLMAG ISSN: 0032-3861. Journal written in English. CAN 127:278572 AN 1997:635230 CAPLUS
Abstract
The interactions of poly(methacrylic acid) (PMA), poly(acrylic acid) (PAA) and a copolymer of acrylamide and acrylic acid (CAMAA) with copper (II) ions in aq. solns. were studied by ESR spectroscopy as a function of the degree of neutralization . A procedure for decompn. of the ESR spectra was developed in order to evaluate the fraction of free copper and bound copper ions. When a loss of the ESR signal intensity is obsd. in the solns. contg. polymer with respect to the one of the ref. copper salt solns. without polymer, this effect is attributed to the formation of a binuclear polymer/copper complex (copper:carboxylates, 2/4), inactive in ESR. The complex visible in ESR is assumed to be mononuclear (copper:carboxylates, 1/2). This indicates that the main PMA/copper complex is binuclear. PAA and copper interactions lead to both bi- and mono-nuclear complexes, but this last species is preponderant at the higher values. In the case of CAMAA of lower charge d. and where the charges are quenched, only a mononuclear complex was found. The consts. of formation of the mono- and bi-nuclear complexes were evaluated by assuming that the system was ruled by a series of equil. laws: copper hydrolysis, polymer ionization and polymer/copper complexation. The peculiar behavior for PAA may be explained by considering that the const. of formation for the binuclear complex decreases when the intramol. monomer concn. is lowered by the chain expansion.
Bibliographic Information
Kinetic study of poly(acrylic acid)-copper(II) complex formation. Nishikawa, Hiroshi; Tsuchida, Eishun. Dep. Polym. Chem., Waseda Univ., Tokyo, Japan. Bulletin of the Chemical Society of Japan (1976), 49(6), 1545-8. CODEN: BCSJA8 ISSN: 0009-2673. Journal written in English. CAN 85:113080 AN 1976:513080 CAPLUS
Abstract
The kinetics of poly(acrylic acid)-copper(II) (PAA-Cu) complex formation was studied by a relaxation method. The greater stability of PAA-Cu complex than that of a monomeric analog is due to the increase of forward rate const. (kf(PAA)/kf(GA) = 4) where GA is glutaric acid and decrease of the reverse rate const. (kr(PAA)/kr(GA) = 1/4) in the polymer system. The results are explained in terms of an electrostatic effect of polyelectrolyte and a conformational change of the polymer ligand.
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